Steam-boiler



A. LOWY.

STEAM BOILER.

APPLICATION HLED JUNE 26. ms.

14,3 1 7,930 Patented Oct. 7, 1919.

HHIHIHHII mum ' wlmfss m'v mrok Of M44 2% w l TTOR'IEK UNITED STATES OFFICE.

ARTHUR LOWY, OF FEWARK, NEW JERSEY, ASSIGNOR TO NEW YORK ENGINEERIITG COMPANY, A CORPORATION OF NEW YORK.

STEAM-BOILER.

Specification of Letters Patent.

Patented Oct. 7, 1919.

Application filed June 26, 1918. Serial No. 241,923.

To all whom it may concern:

Be it known that I, ARTHUR Lowr, a citizen of the United States,and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Steam-Boilers, of which the'following is a specification.

This invention relates to steam boilers, and has for its object to provide means in a boiler of the water tube and drum type having a longitdinal baflie whereby the tubes can be more evenly heated and dead spaces avoided, as compared with constructions heretofore used.

In a boiler having a plurality of drums connected by inclined rows of tubes, and having a battle midway of the tubes extending from the upper drum toward the lower drum, the bulk of the hot gases follows the shortest path to the stack midway of the tube bank and the drums, so that the outside or end tubes do not get suflicient heat, and the middle tubes get more heat than they can absorb. This results in dead spaces at the ends of the bank and a loss in heating efficiency. This invention provides means for interrupting the flow of gases around the b-afiie at its middle portion, compelling them to take the longer path to the stack which includes the outer or end tubes of the bank, thus resulting in a more even heating of the entire bank, and better efiiciency. In order that the best operating efiiciency can be obtained this additional bailiing means is made adjustable during 0 eration of the boiler, since a fixed baffle ma e in the shop cannot satisfy the changed conditions due to working ressure, character of fuel, draft, etc, foun in practice.

In the accompanying drawing,

Figure 1 represents an end view of a boiler, partly in section, embodying the invention,

Fig. 2 is a section on the line 2-2 of Flg. 1 an Fi 3 is a detail View of the adjustable overlapping baflles.

1 represents the fire-box, 2 the lower drum, 3 the upper drum, 4 the tubes, 6 the central stack, and 7 the stationary baflle. This bafile is preferably located parallel the tubes and between the middle rows mldway of the bank of tubes and extends from the up or drum 8 toward the lower drum 2, be as s aced from the latter to provide the lower raft opening 8. The lower edge of the bafiie 7 carriesan angle edge 10 and the lower drum carries a similar angleedge 11, preferably in the same plane as the baffle and forming a continuation thereof. Mounted to slide on these edges 10, 11, and to be supported thereby, are two or more bafiie plates 12, 13, which are cut away so as to overlap as shown in Fig. 3, each carrying an operating-rod 15, a handle 16, and stop luv 17, the handles 16 stopping against the casing of the boiler when the plates are at their inner positions, and the In 17 preventing separation of the plates. ther forms of adjustable plates, supporting means, and stops may be used instead of those specifically shown.

When the baffies are collapsed to give the widest draft opening, they will preferably cover not over one quarter of the opening. This area is determined relatively to the area of the stack in the design of the boiler, and the fixed bafiie 7 and the movable baffles 12, 13 will be so proportioned as to provide the proper area. The baffles 12, 13 have the function of dividing the hot ases so as to deflect them toward the ends w ere the tubes ordinarily are somewhat cooler than those at the middle owing to the gases taking the shortest path. After the gases pass the baffles 12, 13, they converge in the stack 6, thus resulting in a somewhat longer and more prolonged ath of contact of the hot ases with the tu es on both sides of the ba es 7 12, 13. When the bafiies are expanded, they will cover about one-half of the area between the baflie 7 and lower drum 2, giving a range of approximately 50% variation which is sufficient for most uses. While the baflie 7 is shown as midway of the tube bank, it will be understood that it can be located at other points as lon as the additional baflies 12, 13, perform t e function of deflecting the hot gases to heat the tubes in such manner as to induce the best circulation and to prolong the contact of the hot gases with the tubes. It is thus assured that the gases will not short circuit away from the end tubes, and the diagonal return of the gases toward the stack will insure that all tubes are equally heated when the baffles are roperly adjusted. The use of this inmat on wil enable a considerable economy the e d e p ei h ,GQPQ milky-tent mlb fibmh 1 9" ce s 9 -1211, by efldreisingthe "Gognmlgeioper Patents.

in fuel to be 1: :li d and it enbe easily applied to tziistiiig fibilers with betterresults than are at present obtained by fixed bellies. Vevieue medificatio'nsem eh'an es may be made without departing from t'e scope of the appended claims.

What is claimed, is:

1. A boiler having vertically so aarated drums cofinectedi-bjyunlined rows 6" tubes, at fire box below the ugper d xn and baffling means parallel with liIlt between'the --hv .il r t heu n id mat-.1

Amid. e. fiplw ti wee -Malia i W i r-b et e P e? nun m 1 a an-e mpisi xe y thes aidfixed ballle arranged to ,form openings at jacent t e ends of one of the drums', and tie said collapsible baflle arranged to vary said openings to equalize-the heating.

'3. A boiler-having separated drums con neeted b y tubes, a fixed balfle between interlhedl'ate rows of tubes extending from one drum toward the other drum, adjustable battles between the intermediate portion of thelixed b afileand said other drum to form variable openings around said baffle adjacent the ends of seid oti er ,dgum the eaid adtinsel them P edfiw -i e $8 1 1 .th ow: wdee wt a v a b i w ee m qp em P wh hmh e e w geee m 9 i S}, e e Ne orke mnth c unt of New iifik ,and fit fte, 0f eW York, th s 3 4th day of une, A. D. 19.18;

ARTHUR LQVV Y. 

